Accelerated Hexavalent Chromium [Cr (VI)] Reduction with Electrogenerated Hydrogen Peroxide in Microbial Fuel Cells

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Abstract:

Cr(VI) was reduced at a carbon felt cathode in an air-cathode dual-chamber microbial fuel cell (MFC). The reduction of Cr(VI) was proven to be strongly associated with the electrogenerated H2O2 at the cathode. At pH 3.0, only 27.3% of Cr(VI) was reduced after 12h in the nitrogen-bubbling-cathode MFC, while complete reduction of Cr(VI) was achieved after 6h in the air-bubbling-cathode MFC in which the reduction of oxygen to H2O2 was confirmed. The results showed that the efficient reduction of Cr(VI) could be achieved with an air-bubbling-cathode MFC.

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Periodical:

Advanced Materials Research (Volumes 512-515)

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1525-1528

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May 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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